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高温材料处理:国际期刊
ESCI SJR: 0.176 SNIP: 0.48 CiteScore™: 1.3

ISSN 打印: 1093-3611
ISSN 在线: 1940-4360

高温材料处理:国际期刊

DOI: 10.1615/HighTempMatProc.v8.i1.40
pages 39-44

OPTIMIZATION OF LOW ENERGY LASER ION SOURCE WITH THE USE OF MAGNETIC AND ELECTRIC FIELDS

J. Wolowski
Institute of Plasma Physics and Laser Microfusion, 23 Eery St (23), 00-908 Warsaw, Poland
J. Badziak
Institute of Plasma Physics and Laser Microfusion, 23 Eery St (23), 00-908 Warsaw, Poland
I. Ivanova-Stanik
Institute of Plasma Physics and Laser Microfusion, 23 Eery St (23), 00-908 Warsaw, Poland
P. Parys
Institute of Plasma Physics and Laser Micro fusion, 23 Eery St (23), 00-908 Warsaw, Poland
W. Stepniewski
Institute of Plasma Physics and Laser Microfusion, 23 Eery St (23), 00-908 Warsaw, Poland
E. Woryna
Institute of Plasma Physics and Laser Micro fusion, 23 Eery St (23), 00-908 Warsaw, Poland

ABSTRACT

The laser-produced plasma has been proposed to be an efficient source of ions for particle accelerators and ion implantation technology. The aim of the experiments performed at the IPPLM in Warsaw consisted of a study of the magnetic and electric fields effects on the laser-produced ions. A Nd:glass laser (1.06 μm, ≤ 2 J, 1 ns) was used for producing a low energy W ions and the Helmholtz coils was applied for generation of a magnetic field (0.2 - 1.2 T) in front of the target. A transverse electric field (about 250 V/cm) was used for the elimination of light contaminant ions from the ion beam or for the selection of a specific tungsten ion group. The ion diagnostics, i.e. ion collectors and an electrostatic ion-energy analyzer were based on the time-of-flight method. For measurements of angular dependencies of the ion stream parameters, a set of 5 small ion collectors was located at small angles (2.1° - 6.5°) on the both sides of the target normal. The measured angular distributions of ions show that the concentration of the ion stream close to the target normal increases with the increase of the magnetic field induction and laser energy. The simple Monte Carlo calculations taking into account experimental data confirm the effect of the concentration of the laser-produced ion stream as a result of the magnetic field action in our experimental conditions.


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